diff --git a/ospfd/ospf_packet.h b/ospfd/ospf_packet.h
index 3cbe889..337686a 100644
--- a/ospfd/ospf_packet.h
+++ b/ospfd/ospf_packet.h
@@ -121,6 +121,10 @@
   u_int32_t dd_seqnum;
 };
 
+struct ospf_ls_update
+{
+  u_int32_t num_lsas;
+};
 
 /* Macros. */
 /* XXX Perhaps obsolete; function in ospf_packet.c */